Remote Access and Dial-Up Networking Restrictions

Disabling Save Password Option in Dial-Up Networking - When you
dial a phonebook entry in Dial-Up Networking (DUN), you can use the 'Save
Password' option so that your DUN password is cached and you will not need to
enter it on successive dial attempts. This key disables that option. Option
affects the whole PC. Reboot your PC to activate or deactivate this option.
Applicable to Windows NT/2000/XP.

Disable the "Log on using dial-up connection" Check Box - During
logon Windows allows users to optionally connect to a Windows domain using
dial-up networking, this tweak can be used to disable that option. Option
affects the whole PC. Reboot your PC to activate or deactivate this option.
Applicable to Windows NT.

Disable Dial-In Access - It's possible for users to setup a modem
on a Windows machine, and by using Dial-up Networking allow callers to connect
to the internal network. Especially in a corporate environment this can cause
a major security risk. Option affects the whole PC. Reboot your PC to activate
or deactivate this option. Applicable to Windows 95/98/ME/NT.